Hi,
We've been using H-Sphere for almost 2 years now, and love it - the product is great, although I think it can take a little getting used to
PSoft and their support is also very good, they have recently started a nomination/voting - license holders can ask for new features and vote for them etc
We have no plans on moving away at all
If there is anything more specific you'd like to know just let me know!
Cheers,
Sean